Steric separation of nucleophile and Lewis acid providing dramatically accelerated reaction. High-speed polymerization of methyl methacrylate with enolate-aluminum porphyrin/sterically crowded organoaluminum systems

1991 ◽  
Vol 113 (15) ◽  
pp. 5903-5904 ◽  
Author(s):  
Masakatsu Kuroki ◽  
Tsuyoshi Watanabe ◽  
Takuzo Aida ◽  
Shohei Inoue
Keyword(s):  
Methyl Methacrylate ◽  
Lewis Acid ◽  
High Speed

Biplane ventriculography in the rat

1986 ◽  
Vol 250 (1) ◽  
pp. H131-H136
Author(s):  
J. L. Heckman ◽  
L. Garvin ◽  
T. Brown ◽  
W. Stevenson-Smith ◽  
W. P. Santamore ◽  
...  
Keyword(s):  
Cardiac Output ◽  
Left Ventricle ◽  
Ejection Fraction ◽  
Stroke Volume ◽  
Methyl Methacrylate ◽  
High Speed ◽  
Water Displacement ◽  
Systolic Volume ◽  
End Diastolic Volume ◽  
End Systolic Volume

Biplane ventriculography was performed on nine intact anesthetized rats. Images of the left ventricle large enough for analysis were obtained by placing the rats close to the radiographic tubes (direct enlargement). Sampling rates, adequate for heart rates of 500 beats/min, were obtained by filming at 500 frames/s. From the digitized silhouettes of the left ventricle the following information was obtained (means +/- SE): end-diastolic volume 0.60 +/- 0.03 ml, end-systolic volume 0.22 +/- 0.02 ml, stroke volume 0.38 +/- 0.02 ml, ejection fraction 0.63 +/- 0.02, cardiac output 118 +/- 7 ml/min, diastolic septolateral dimension 0.41 +/- 0.01 mm, diastolic anteroposterior dimension 0.40 +/- 0.01 mm, diastolic base-to-apex dimension 1.58 +/- 0.04 mm. To determine the accuracy with which the volume of the ventricle could be measured, 11 methyl methacrylate casts of the left ventricle were made. The correlation was high (r = 0.99 +/- 0.02 ml E) between the cast volumes determined by water displacement and by use of two monoplane methods (Simpson's rule of integration and the area-length method applied to the analysis of the anteroposterior films) and a biplane method (area-length). These results demonstrate that it is possible to obtain accurate dimensions and volumes of the rat left ventricle by use of high-speed ventriculography.

High-speed living anionic polymerization of methacrylic esters with aluminum porphyrin initiators. Organoaluminum compounds as Lewis acid accelerators

1993 ◽  
Vol 26 (13) ◽  
pp. 3403-3410 ◽  
Author(s):  
Hiroshi Sugimoto ◽  
Masakatsu Kuroki ◽  
Tsuyoshi Watanabe ◽  
Chikara Kawamura ◽  
Takuzo Aida ◽  
...  
Keyword(s):  
Lewis Acid ◽  
Anionic Polymerization ◽  
High Speed ◽  
Organoaluminum Compounds ◽  
Living Anionic Polymerization

Lewis acid - assisted high speed living anionic polymerization by the aluminum porphyrin - Lewis acid systems

1993 ◽  
Vol 67 (1) ◽  
pp. 125-135 ◽  
Author(s):  
Takuzo Aida ◽  
Masakatsu Kuroki ◽  
Hiroshi Sugimoto ◽  
Tsuyoshi Watanabe ◽  
Takato Adachi ◽  
...  
Keyword(s):  
Lewis Acid ◽  
Anionic Polymerization ◽  
High Speed ◽  
Living Anionic Polymerization

Lewis Acid-Mediated Copolymerization of Methyl Acrylate and Methyl Methacrylate with 1-Alkenes

2005 ◽  
Vol 38 (17) ◽  
pp. 7262-7265 ◽  
Author(s):  
Megan Nagel ◽  
Dawn Poli ◽  
Ayusman Sen
Keyword(s):  
Methyl Methacrylate ◽  
Lewis Acid ◽  
Methyl Acrylate
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